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(No Model.) 2 Sheets-Sheet 1.

G. A. EARTH.

PISTON ROD GUIDE PACKING.

No. 398,931 Patented Mar. 5, 1889.

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(No Model.) 2 Sheets-Sheet 2.

G. A. EARTH. PISTON ROD GUIDE PAOKING.

No. 398,931. Patented Mar. 5, 1889.

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UNITED STATES PATENT @rrrcn.

GUSTAV A. EARTH, OF ST. LOUIS,

MISSOURI, ASSIGNOR- TO PIERRE CHOUTEAY, OF. SAME PLACE.

PiSTON-ROI -GUIDE PACKING.

SPECIFICATION forming part of Letters Patent No. 898,931, dated March 5,1889. Application filed December 27, 1888. Serial No. 294,756. (Nomodel.)

T0 a-ZZ whom it may concern.-

Be it known that l, JlUsTnv A. EARTH, a citizen of the United States,residing at the l city of St. Louis, State of Missouri, have invented acertain new and useful Improved Holding Device for thePi-St-OII'ROClrGHidG Packing of a Direct-Acting Steam or PneumaticEngine, of whichthe following is a full, clear, and exact description.

My invention relates to improved means of securing the packing devicedesigned for guiding the extension piston-rod of a direct-acting steamor pneumatic engine,and is preferably applicable to the inventiondescribed in an application for Letters Patent of the United States,Serial No. 283,220, filed by me August 20, 1888, allowed November 27,1888, for improvements in direct-acting steam or pneumatic engines; andmy invention has for its object to prevent the working loose of suchpacking from the jar of the tool, as now occurs when the packing isfixed by bolts, asin the said patent.

Itconsisis in a slotway formed longitudil nally through that portion ofthe cylindrical tube or casing containing the packing, akey or tonguebeing inserted within the slot and between the divided edges of thepacking, combined with bolts, on tightening which the divided portionsof the casin g are closed upon the packing and tongue, and the packingthereby firmly held in place.

On the accompanying drawings, Figure 1 represents a longitudinalelevation of the cylindrical tube or casing broken away, forming part ofa direct'actin mining-engine (not shown) and containing thepiston-rod-guidc packing secured thereto according to m y invention;Fig. 2, a similar view of the righthand end portion thereof, taken atright angles to Fig. 1; Figs. 3 and at, transverse sectional views onlines 1 l and 2 respectively, in Fig. 1; and Fig. 5, a detached view ofthe key or tongue forming part of Figs. 1 to 4, like letters ofreference denoting like parts in all the figures.

a represents the cylindrical tube or casing, having at one end a flange,a, by which it is secured to the cylinder end (not shown) of adirect-acting mining-engine in a similar manner to that described in mysaid application for Letters Patent.

Longitudinally into the outer end portion,

0. of the tube or casing a, which is bored thereatfor the purpose, areinserted two (or more) packing-strips, 7), which are grooved or shaped,respectively, on their insides to the external shape of the extensionpiston-rod c, and are turned on their outsides, so that when placedtogether they will exactly fit within the bored end portion, (1 of thecasing a and around the rod c, which is preferably square, with convexcorners where it reciprocates through the packing b, so as to preventthe rotation of the rod 0 during the operation of 6 the machine.

Lon gitudinally through the wall of the outer end portion, 0?, of thecasing (1, containing the packing h, is formed a slot, d, within whichis placed fiatwise a key or tongue, 0, having its inner edge projectedwithin the casing a, so as to engage between adjacent edges of thepacking-strips b.

Projecting from the wall of the casing a, adjacent to each edge of theslot (Z, are lugs f, through which and through the interposed 1 key ortongue e, at right angles to the latter and to the longitudinal centerof the casing a, are passed bolts g, arranged at a suitable distanceapart and provided with nuts g, whereby on tightening the bolts 9 thelugs f and divided wall a of the casing o. are drawn together, and,closing upon the tongue 6 and circumference of the packing-strips 7),thereby clamps and firmly secures the packing b from rotating orshifting endwise within the easing a and securely holds the piston-rodin its proper position.

I claim as my invention 1. In a piston-rod packing, the combination 0 ofa key or tongue inserted within a slotway formed through the wall of thecasing containing the packing, with bolts passing through the said walland tongue, and means for tightening said bolts, substantially as shown,and

for the purpose described.

2. In a piston-rod packing, the combination of a key or tongue insert-edwithin a slotway formed through the wall of the casing containing thepacking and entering the circunifcr- IOC once of the said paeking, withbolts passing I through the said wall and tongue, and means fortightening the bolts, substantially as shown, and for the purposedescribed.-

3. The combination of packing-strips Z), insorted within the cylindricaltube or casing (t a and fitted around the piston-rod c of adirect-acting engine, slotway (Z, formed longitudinally through the walla of the easing,

key or tongue e, inserted fiatwise within the slotway d and engagingbetween adjacent edges of the packing-strips b, lugs f, project- 5 ingfrom the wall a? of the easing, with bolts i g, passing through the lugsf and interposed tongue 6 and provided with nuts e, substani tially asshown, and for the purpose described.

In testimony whereof I affix my signature, in presence of two witnesses,this 22d day of December, 1888.

GUSTAV A. EARTH.

itnesses:

S. L. SCHRADER, PAUL BAKEWELL.

